21509520

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:177

約数の個数: 160

約数和(自身を含む): 72316800

約数和(自身を除く): 50807280

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 19, 20, 24, 30, 38, 40, 48, 53, 57, 60, 76, 80, 89, 95, 106, 114, 120, 152, 159, 178, 190, 212, 228, 240, 265, 267, 285, 304, 318, 356, 380, 424, 445, 456, 530, 534, 570, 636, 712, 760, 795, 848, 890, 912, 1007, 1060, 1068, 1140, 1272, 1335, 1424, 1520, 1590, 1691, 1780, 2014, 2120, 2136, 2280, 2544, 2670, 3021, 3180, 3382, 3560, 4028, 4240, 4272, 4560, 4717, 5035, 5073, 5340, 6042, 6360, 6764, 7120, 8056, 8455, 9434, 10070, 10146, 10680, 12084, 12720, 13528, 14151, 15105, 16112, 16910, 18868, 20140, 20292, 21360, 23585, 24168, 25365, 27056, 28302, 30210, 33820, 37736, 40280, 40584, 47170, 48336, 50730, 56604, 60420, 67640, 70755, 75472, 80560, 81168, 89623, 94340, 101460, 113208, 120840, 135280, 141510, 179246, 188680, 202920, 226416, 241680, 268869, 283020, 358492, 377360, 405840, 448115, 537738, 566040, 716984, 896230, 1075476, 1132080, 1344345, 1433968, 1792460, 2150952, 2688690, 3584920, 4301904, 5377380, 7169840, 10754760, 21509520]

約数ペア:

[(1, 21509520), (2, 10754760), (3, 7169840), (4, 5377380), (5, 4301904), (6, 3584920), (8, 2688690), (10, 2150952), (12, 1792460), (15, 1433968), (16, 1344345), (19, 1132080), (20, 1075476), (24, 896230), (30, 716984), (38, 566040), (40, 537738), (48, 448115), (53, 405840), (57, 377360), (60, 358492), (76, 283020), (80, 268869), (89, 241680), (95, 226416), (106, 202920), (114, 188680), (120, 179246), (152, 141510), (159, 135280), (178, 120840), (190, 113208), (212, 101460), (228, 94340), (240, 89623), (265, 81168), (267, 80560), (285, 75472), (304, 70755), (318, 67640), (356, 60420), (380, 56604), (424, 50730), (445, 48336), (456, 47170), (530, 40584), (534, 40280), (570, 37736), (636, 33820), (712, 30210), (760, 28302), (795, 27056), (848, 25365), (890, 24168), (912, 23585), (1007, 21360), (1060, 20292), (1068, 20140), (1140, 18868), (1272, 16910), (1335, 16112), (1424, 15105), (1520, 14151), (1590, 13528), (1691, 12720), (1780, 12084), (2014, 10680), (2120, 10146), (2136, 10070), (2280, 9434), (2544, 8455), (2670, 8056), (3021, 7120), (3180, 6764), (3382, 6360), (3560, 6042), (4028, 5340), (4240, 5073), (4272, 5035), (4560, 4717)]